Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 02b24824306b2b45f9e8826ac8eb176f7488e3a9aeab3495cd47947d2bf84961:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^